DE2228302B2 - Telescopic gas spring - Google Patents

Telescopic gas spring

Info

Publication number
DE2228302B2
DE2228302B2 DE2228302A DE2228302A DE2228302B2 DE 2228302 B2 DE2228302 B2 DE 2228302B2 DE 2228302 A DE2228302 A DE 2228302A DE 2228302 A DE2228302 A DE 2228302A DE 2228302 B2 DE2228302 B2 DE 2228302B2
Authority
DE
Germany
Prior art keywords
cylinder
piston
gas spring
piston rod
closed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE2228302A
Other languages
German (de)
Other versions
DE2228302A1 (en
DE2228302C3 (en
Inventor
Lawrence George Birmingham Nicholls (Grossbritannien)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Girling Ltd
Original Assignee
Girling Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Girling Ltd filed Critical Girling Ltd
Publication of DE2228302A1 publication Critical patent/DE2228302A1/en
Publication of DE2228302B2 publication Critical patent/DE2228302B2/en
Application granted granted Critical
Publication of DE2228302C3 publication Critical patent/DE2228302C3/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/0209—Telescopic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/20—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with the piston-rod extending through both ends of the cylinder, e.g. constant-volume dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/48—Arrangements for providing different damping effects at different parts of the stroke
    • F16F9/49—Stops limiting fluid passage, e.g. hydraulic stops or elastomeric elements inside the cylinder which contribute to changes in fluid damping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/58—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder
    • F16F9/585—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder within the cylinder, in contact with working fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Springs (AREA)
  • Combined Devices Of Dampers And Springs (AREA)

Description

Die Erfindung betrifft eine Teleskopgasfeder mit einem an einem Ende geschlossenen Zylinder, einer abdichtend durch das andere. Ende des Zylinders hindurchgeführten Kolbenstange mit einem in dem Zylinder verschiebbaren Kolben und einer Hilfsgasfeder, die erst wirksam wird, wenn der Kolben beim Einschieben der Kolbenstange in den Zylinder seine Endstellung nahezu erreicht hat.The invention relates to a telescopic gas spring with a cylinder closed at one end, one of which is sealing through the other. End of the cylinder passed through piston rod with one in the cylinder displaceable piston and an auxiliary gas spring, which only becomes effective when the piston is pushed in the piston rod in the cylinder has almost reached its end position.

Bei einer bekannten Teleskopgasfeder dieser An (US-PS 12 61 011) ist am geschlossenen Ende des Zylinders eine Hilfsfeder in Form einer Schraubenfeder vorgesehen, die erst wirksam wird, wenn 1er Kolben beim Einschieben der Kolbenstange in den Zylinder seine Endstellung nahezu erreicht hat. Dabei wirkt der Kolben nicht unmittelbar auf die Schraubenfeder, sondern fiber das komprimierte Gas auf einen Zwischenkolben, der seinerseits zwischen sich und dem geschlossenen Zylinderende einen weiteren Gasraum einschließt, wodurch eine zusätzliche Federwirkung erzielt ist.In a known telescopic gas spring to this (US-PS 12 61 011) is at the closed end of the cylinder an auxiliary spring in the form of a helical spring is provided, which is only effective when 1 piston at Pushing the piston rod into the cylinder has almost reached its end position. The piston acts here not directly on the coil spring, but via the compressed gas on an intermediate piston, which in turn encloses a further gas space between itself and the closed end of the cylinder, whereby an additional spring effect is achieved.

Bei einem pneumatischen Arbeitszylinder ist es an sich bekannt (BE-PS 6 38 166), in der Endphase des Kolbenhubs die Beschleunigung des Kolbens dadurch auf Null herabzusetzen, daß ein in Richtung zum geschlossenen Ende des Zylinders sich erstreckender Fortsatz am Kolben in einen Zylinderabschnitt von vermindertem Innendurchmesser abdichtend einfährt. Der Zylinderabschnitt ist dabei über eine ventilgesteuerte Öffnung mit der Atmosphäre verbunden.In the case of a pneumatic working cylinder, it is known per se (BE-PS 6 38 166), in the final phase of the Piston stroke reducing the acceleration of the piston to zero by moving a towards the closed End of the cylinder extending extension on the piston in a cylinder section of retracts sealingly reduced inner diameter. The cylinder section is valve-controlled Opening connected to the atmosphere.

Der Erfindung liegt die Aufgabe zugrunde, eine Teleskopgasfeder so auszubilden, daß in der Endphase des Hubs ein solcher zusätzlicher Gasdruck erzeugt wird.The invention is based on the object of designing a telescopic gas spring so that in the final phase of the Hubs such an additional gas pressure is generated.

daß beim Einfahren der Kolbenstange der Hub begrenzt wird und daß beim Ausfahren der Kolbenstange zu Beginn des Hubs eine erhöhte Druckkraft auf die Kolbenstange ausgeübt wird.that when the piston rod retracts the stroke is limited and that when the piston rod extends an increased pressure force is exerted on the piston rod at the beginning of the stroke.

Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgesehen, daß der Kolben oder die Kolbenstange in an sich bekannter Weise einen sich in Richtung zum geschlossenen Ende des Zylinders erstreckenden Fortsatz aufweist und daß am geschlossenen Ende des Zylinders ein Zylinderabschnitt von vermindertem Innendurchmesser ausgebildet ist, in den der Fortsatr bei Annäherung des Kolbens an seine Endstellung abdichtend eindringtTo solve this problem it is provided according to the invention that the piston or the piston rod in in a manner known per se an extension extending in the direction of the closed end of the cylinder and that at the closed end of the cylinder a cylinder section of reduced inner diameter is designed in which the Fortsatr sealingly when the piston approaches its end position penetrates

Eine Teleskopgasfeder gemäß der Erfindung wird mit besonderem Vorteil zum öffnen von Hauben und nach oben zu öffnenden Türen von Fahrzeugen angewendet. Wegen der Geometrie der Türen, an denen derartige Federn angebracht sind, ist es schwierig, die gewünschte Öffnungsgeschwindigkeit aus der geschlossenen in die geöffnete Stellung zu erzielen in·,besondere ist ein höherer Druck nötig, um die Tür während des ersten Stadiums des öffnens anzuheben, als beim fortgesetzten Öffnen der Tür. Ferner ist es zur Vermeidung von Beschädigungen der Tür beim Schließen wünschenswert, eine Einrichtung zu haben, die die Bewegung der Tür begrenzt, wenn sich diese der geschlossenen Stellung nähen. Alle diese Anforderungen erfüllt die Teleskopgasfeder nach der Erfindung.A telescopic gas spring according to the invention is particularly advantageous for opening hoods and upward opening doors of vehicles applied. Because of the geometry of the doors on which Such springs are attached, it is difficult to get the desired opening speed from the closed To achieve the open position in ·, a higher pressure is needed to keep the door open during the the first stage of opening than when the door is opened continuously. Furthermore, it is for avoidance from damage to the door when closing it is desirable to have a device that prevents the movement the door limits when these sew the closed position. All of these requirements met the telescopic gas spring according to the invention.

Die Erfindung wird nachfolgend an Hand schematischer Zeichnungen an einem Ausführungsbeispiel näher erläutert.The invention is explained in more detail below with reference to schematic drawings of an exemplary embodiment explained.

F i g. 1 zeigt einen Schnitt durch ein Ausführungsbeispiel einer erfindungsgemäßen Gasfeder;F i g. 1 shows a section through an embodiment of a gas spring according to the invention;

F i g. 2 ist eine graphische Darstellung der Betriebsmerkmale der in F i g. 1 gezeigten Gasfedern.F i g. Figure 2 is a graphical representation of the operational characteristics the in F i g. 1 gas springs shown.

Die gezeigte Gasfeder weist einen Kolben 1 auf, der an einer Kolbenstange 3 befestigt und mit einer Dämpfungsöffnung 2 ausgebildet ist und der in dem ihm zugeordneten Zylinder 5 hin- und herbewegbar ist.The gas spring shown has a piston 1 which is attached to a piston rod 3 and has a damping opening 2 and which can be moved back and forth in the cylinder 5 assigned to it.

Die Kolbenstange 3 hat einen Abschnitt 8, der sich über den Kolben 1 hinaus in den Zylinder 5 erstreckt. Im Ende des Zylinders 5 ist eine Bohrung 6 von geringerem Durchmesser als die Zylinderbohrung vorgesehen, in der eine Dichtung 7 angeordnet isi. Der Betrieb wird im folgenden an Hand der F i g. 2 erläutert.The piston rod 3 has a section 8 which extends beyond the piston 1 into the cylinder 5. In the end of the cylinder 5 there is a bore 6 with a smaller diameter than the cylinder bore, in which a seal 7 is arranged. Operation is described below with reference to FIGS. 2 explained.

Beim Zusammendrücken steigt bei der Druckänderung von Pi (dem Ladedruck) nach Pi der auf die Kolbenstange 3 ausgeübte Druck im wesentlichen linear. Bei der dem Punkt Pi entsprechenden Stellung tritt der Kolbenstangenabschnitt 8 in die Bohrung 6 ein, wodurch der Wirkung nach eine Hilfsgasfeder gebildet wird, und die Steigerungsrate des Drucks nimmt bei der Kolbenstangenbewegung wegen des zusätzlichen Widerstandes der Hilfsgasfeder zu.During compression, the pressure exerted on the piston rod 3 increases essentially linearly as the pressure changes from Pi (the boost pressure) to Pi. In the position corresponding to the point Pi , the piston rod section 8 enters the bore 6, whereby the effect of an auxiliary gas spring is formed, and the rate of increase of the pressure increases with the piston rod movement because of the additional resistance of the auxiliary gas spring.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (1)

Patentanspruch:Claim: 1010 Teleskopgasfeder mit einem an einem Ende geichlossenen Zylinder, einer abdichtend durch das tndere Encie des Zylinders hindurchgefübrten Kolkenstange mit einem in dem Zylinder verschiebbaren Kolben und einer Hilfsgasfeder, die erst wirklam wird, wenn der Kolben beim Einschieben der Kolbenstange in den Zylinder seine Endstellung nahezu erreicht hat, dadurch gekennzeichnet, daß, wie an sich bekannt, der Kolben (1) oder die Kolbenstange (3) einen sich in Richtung zum geschlossenen Ende des Zylinders (5) erstreckenden Fortsatz aufweist und daß am geschlossenen Ende des Zylinders (5) ein Zylinderabschnitt (7) von vermindertem Innendurchmesser ausgebildet ist, in den der Fortsatz (8) bei Annäherung des Kolbens (1) an leine Endstellung abdichtend eindringt.Telescopic gas spring with one closed at one end Cylinder, a piston rod sealingly guided through the other housing of the cylinder with a piston that can be displaced in the cylinder and an auxiliary gas spring that really works when the piston is almost in its end position when the piston rod is pushed into the cylinder has achieved, characterized that, as is known per se, the piston (1) or the piston rod (3) moves towards the closed Has the end of the cylinder (5) extending extension and that at the closed end of the cylinder (5), a cylinder section (7) of reduced inner diameter is formed in the the extension (8) penetrates sealingly when the piston (1) approaches the end position.
DE2228302A 1971-06-09 1972-06-09 Telescopic gas spring Expired DE2228302C3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1965871A GB1402849A (en) 1971-06-09 1971-06-09 Telescopic gas springs

Publications (3)

Publication Number Publication Date
DE2228302A1 DE2228302A1 (en) 1972-12-28
DE2228302B2 true DE2228302B2 (en) 1975-03-27
DE2228302C3 DE2228302C3 (en) 1975-10-30

Family

ID=10133030

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2228302A Expired DE2228302C3 (en) 1971-06-09 1972-06-09 Telescopic gas spring

Country Status (6)

Country Link
US (1) US3831919A (en)
JP (1) JPS5214830B1 (en)
BR (1) BR7203720D0 (en)
DE (1) DE2228302C3 (en)
FR (1) FR2141275A5 (en)
GB (1) GB1402849A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2619176A1 (en) * 1976-04-30 1977-11-10 Stabilus Gmbh GAS SPRING WITH RELEASED EXTENSION FORCE WITH RETRACTED PISTON ROD
DE3546236A1 (en) * 1985-12-28 1987-07-02 Bauer Fritz & Soehne Ohg Gas-filled spring with end-position damping

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2341352C2 (en) * 1973-08-16 1983-10-06 Stabilus Gmbh, 5400 Koblenz Blockable lifting unit with end suspension
DE2907100A1 (en) * 1979-02-23 1980-08-28 Bauer Fritz & Soehne Ohg LENGTH ADJUSTABLE GAS SPRINGS
US4623132A (en) * 1985-02-27 1986-11-18 Fichtel & Sachs Industries, Inc. Gas spring counterbalance system
DE3818811A1 (en) * 1988-06-03 1989-12-14 Stabilus Gmbh GAS SPRING WITH SEVERAL PRESSURE SPACES
DE3939118C2 (en) * 1989-11-25 1998-04-09 Stabilus Gmbh Gas spring with graduated force characteristic
GB2248482B (en) * 1990-10-03 1994-07-06 Kenneth Marden Henfrey Combined spring balance,shock absorber and energy storage system for verticallyrotating beams such as traffic barriers
DE4420134C1 (en) * 1994-06-09 1995-10-05 Fichtel & Sachs Ag Oscillation damper with mechanical traction stop
DE10236137B4 (en) * 2002-08-07 2010-05-06 Suspa Holding Gmbh spring strut
DE10320001B3 (en) * 2003-05-06 2004-08-05 Zf Sachs Ag Oscillation damper has coil spring stop for limiting stroke of piston rod secured by retaining profile formed in wall of damper cylinder
AT7045U1 (en) * 2003-12-15 2004-09-27 Komperdell Sportartikel Gmbh DAMPING DEVICE
PL1859108T3 (en) * 2005-03-17 2011-12-30 Wolf Modul Gmbh Frames for buildings
JP5077549B2 (en) * 2007-10-31 2012-11-21 日立オートモティブシステムズ株式会社 Manufacturing method of hydraulic shock absorber
DE102009049429B4 (en) * 2009-10-14 2014-08-21 Karl Simon Gmbh & Co. Kg sliding arrangement
DE102013104886A1 (en) 2013-05-13 2014-11-13 Karl Simon Gmbh & Co. Kg sliding arrangement
DE102016103800A1 (en) * 2016-03-03 2017-09-07 Brose Fahrzeugteile Gmbh & Co. Kg, Bamberg Drive arrangement of a flap arrangement of a motor vehicle
CN112681925B (en) * 2020-12-16 2022-09-13 北京汽车股份有限公司 Gas spring for vehicle, tail gate and car

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1261011A (en) * 1917-06-28 1918-04-02 Samuel R Cook Pneumatic shock-absorber.
US1605249A (en) * 1922-05-06 1926-11-02 Loyd Mfg Co Shock absorber
US1574000A (en) * 1925-07-16 1926-02-23 Charles R Roberts Shock absorber
US1876145A (en) * 1929-08-14 1932-09-06 John A Mcgrew Hydraulic draft gear
US2048418A (en) * 1932-02-18 1936-07-21 Bendix Aviat Corp Shock absorber strut
US2145891A (en) * 1936-01-28 1939-02-07 Jr John V Rice Antishock spring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2619176A1 (en) * 1976-04-30 1977-11-10 Stabilus Gmbh GAS SPRING WITH RELEASED EXTENSION FORCE WITH RETRACTED PISTON ROD
DE3546236A1 (en) * 1985-12-28 1987-07-02 Bauer Fritz & Soehne Ohg Gas-filled spring with end-position damping

Also Published As

Publication number Publication date
JPS5214830B1 (en) 1977-04-25
BR7203720D0 (en) 1973-06-07
DE2228302A1 (en) 1972-12-28
DE2228302C3 (en) 1975-10-30
US3831919A (en) 1974-08-27
FR2141275A5 (en) 1973-01-19
GB1402849A (en) 1975-08-13

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977